Terminal connecter for electrical windings



C. H. THORDARSON TERMINAL CONNECTOR FOR ELECTRICAL WINDINGS Oct. 9 1923.

Filed Jan. 50. 1922 lllllllllll Patented Oct. 9, 1923.

CHESTER H. THQRDARSON, OF CHICAGO, ILLINOIS.

TERMINAL connnc'rnn non ELECTRICAL wmnmes.

Application filed January 30, 1922. Serial No. 532,802.

To aZZ whom it may concern:

Be it known that I, CHESTER H. THOR- DARSON, a citizen of the UnitedStates, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Terminal.Connectors for Electrical WVindings; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeinv had to the accompanying drawin s, an to the characters ofreference inarke thereon, which form a part of this specification.

This invention relates to improvements i1 windings or coils forelectrical apparatus, and refers more particularly to a novel terminalconnecter for connecting the ends of the winding to external circuitconductors, and also to means for strengthening the winding structure. a

The principal purpose of the invention is to produce a connector elementfor electrically connecting the ends of the winding turns to conductorsof acircuit external to the winding, so arranged. as to avoid pul ingstress on an external circuit conductor being transmitted to the windingconductor in a manner tending to displace the winding turns. A furtherobject of the invention is to so incorporate terminal connecters in thewinding as to support the inner and outer turns thereof in a way tostrengthen the winding and to insulate the connecter from the winding.

A terminal connecter embodying my in.- vention comprises, in generalterms, a. thin, flexible, portion which can be made of a flat stri; goodconducting metal, such a's-coppe. hat is adapted to be anchored'to thecoil tructure, and provided with one or more iaterally disposed branchterminals to atiord connection between the winding and an externalconductor, \Vhen two branch terminals are employed, one is adapted foreiectrical connection to an end. of the winding and the other to anexternal conductor. Said body portion will be made of substantial widthto give it lateral stability, and is of a length to adapt it to be laidupon the winding, either at the inner or thereof, to cover a substantial)1 the length of the inner or outer he winding, and said strip may hensuia e from. the winding turns y means. which nrmly anchor said stripto the wind-- ing. The branch terminal or terminals are integral withthe body portion. For instance, when made of thin, pliable metal, thebranch or branches may beformed by narrow, longitudinal portion orportions partially sheared from the strip and folded at the base orattached portions thereof transversely of the stripand made of lengthsto extend beyond the Side edges of the strips. The said connecter stripsthus laid on the outer and inner turns of the windin can be insulatedfrom said turns by insu ating means which firmly anchor the strips tothe winding, so that the same means perform the double function ofinsulating the connectors from the winding turns and firmly anchoringthe connectors on the winding.

In the drawings:

Figure l is a perspective view of a wind mg equipped with terminalconnectors embodying my invention, with parts of the in-- sulating andanchoring means for the con" necter thrown back to illustrate .thebranch terminals of the connector.

Figure 2 is a perspective view of the in ner terminal connecter and itsinsuiatin and anchoring means.

Figure 3 iliustrates a blank from which one {form of terminal coiureoterand its branches may be conveniently formed, illustra-ting in dottedlines-the form of branches.

Figure 4 illustrates a modified connecter.

As shown in the drawings, 10 designates the winding as a whole. It canbe made up of a plurality of turns of fine round wire conductor suitablytaped to hold the turns of the winding in place.

ll, 11 designate the terminal connectors, as a" whole one adapted to theinner and the other to the outer side of the winding.

Each connector comprises athin, elongated strip 12 of'good conductingmaterial,- such ascnpper, and terminal branches 13, 14, the former ofwhich is adapted to be connected, as by soldering,'at 15 to the end of aturn of the winding and theiatter of which is adapted for a solder orother suitable coir motion to an external circuit ccnductcrlfi. As shownin Figure hthe said branches l3 14 are formed by longitudinaily slittingthe strip 12 along opposite sides thereof, and from opposite directionstowards but terminating short of the iong'itu'dinal center the strip.The narrow portions thus sheared from the strip are then obliquelyfolded at 17 to form the branches 13, lfl, each extending beyond thatedge of the strip remote from the edge of which it is an integral part.Alternately, the narrow branch ortions can be sheared from within theody of the strip 19 (Figure 4.) and folded laterally to constitute thebranches 20, 21.

The strip 12 of the connecter at the outer side of the winding isconfined between inner and outer insulating bands 22, 23, madepreferably of paper of substantial stiffness, with the inner band laidtightly on the outer turn of the winding and pasted together at itsends, and with the outer band laid on the inner band and enclosing theconnecter strip and the bases of the branches, and itself pastedtogether at its ends. The said insulating bands are wider than theconnecter body strip, and said 'bands are pasted together at their sideedges laterally beyond the side edges of said body strip, as well asbeing pasted to said strip, so as to thereby completely envelop saidbody strip and afford a firm anchorage of the connecter to the windingstructure. The said outer connecter strip is made of less length thanthe circumference of the winding to. avoid short circuiting of the stripon itself. Preferably, however, the length of the strip is such as toextend almost around the winding so as to thereby increase theefliciency of the anchorage connection of the strip to the windingstructure.

The strip 12 of the inner connecter is like wise confined between innerand outer bands 24, 25 of insulating material, such as still paper, andof a width greater than the width of the strip, the said bands beingeach pasted together at their ends and being pasted upon each other attheir margins laterally beyond the strip 12 to enclose a form 25 tosupport the inner turns of the winding, and upon which the winding maybe wound. In Fi re 1 said inner connecter and its insulating bands areshown as incorporated in the coil structure. In Figure 2 said parts areseparately shown to better illustrate the same.

After the said connecter strips and their insulating bands have beenincorporated in the winding in the manner described, the parts are boundtogether by suitable taping 26, so as to hold the turns of the windingin place.

The provision of the terminal connec-ters thus incorporated in thewinding serves, not only as a means of preventing pulling stresses onthe external conductor being transmitted to the winding turns, but alsofacili tates attachment of the ends of the winding turns to externalconductors, inasmuch as the extension or" the branch terminals beyondthe edges of the connecter permits such attachment without deranging thewinding turns. This is especially advantageous when the winding is madeup of very fine wire.

In addition to the aforementioned advantages of the terminal connectersthus formed and incorporated in the winding, it will be obvious that thedescribed arrangement of the inner and outer terminal strips and theircooperating insulating bands comprise means which serve to support andvery materially strengthen the winding structure at the inner and outersides thereof and, therefore, enhance the ruggedness and durability ofthe winding structure. Moreover, the strips that lie upon the outerturns of the windings constitute electrostatic shields to protect theadjacent turns against the effect of high surges which would otherwiseexist.

I claim as my invention:

1. A terminal connecter for electrical windings comprising a thin,elongated flexible conducting strip and a terminal branch outlongitudinally therefrom and folded laterally beyond the side margin ofsaid strip.

2. A terminal connecter for electrical windings comprising a thin,elongated, flexible conducting strip, and terminal branches integralwith and extending transversely over and beyond the side margins of saidstrip.

3. A terminal connecter for electrical windings comprising a thin,elongated, flexible conducting strip, and terminal branches cutlongitudinally therefrom and folded laterally and oppositely over saidstrip and beyond the opposite side margins thereof.

4. The combination with an electrical winding, of a thin, flexible, flatterminal connecter applied to a side of the winding and anchored theretoand provided with a terminal branch out from the connecter and folded toextend transversely of and beyond a margin of said connecter.

The combination with an electrical winding, of a flat, thin terminalconnecter lying on and anchored to a side of the..winding and insulatedtherefrom, to which an end of the winding is connected, said connecterbeing provided with an integral laterally extending branch sheared andfolded laterally therefrom for electrical connection to an exteriorconductor.

6. The combination with an electrical winding, of a terminal connectercoinpris mg a tnin. flexible conducting strip lying on a side of thewinding, insulating members to enclose said strip, and lying also on theside of and anchored to said winding, said strip being formed withbranch terminals extending transversely of and laterally beyond themargins of said strip for electrical connection to an end turn of thewinding and an external conductor, respectively.

i. The combination with an electrical winding, of a terminal connectercomprising a thin, flexible conducting strip provided.

beyond said insulating members and one ofthem connected to an end of theWinding.

8. The combination with an electrical winding, of elongated terminalconnector strips, lyingone on the inner and the other on the outer sideof said winding, and means to insulate said strips from, and to anchorthem to said winding, each said strips being electrically connected toan end of a winding turn and provided with a laterally extending branchterminal adapted for connection to an external conductor.

9. The combination with an electrical winding, of elongated terminalconnecter strips, lying one on the inner and the other on the outer sideof said winding, and inner and outer insulating members incorporated inthe winding and enclosing 'said strips, each said strips being formed.with branch terminals extending from said strip and beyond oppositemargins thereof for respective connection to an external conductor andan end of the winding.

In witness whereof I claim the foregoing as my invention, I hereuntoappend my signature this 21st day if January, 1922.

CHESTER H. THORDARSON.

